[GitHub] Wujiao233 opened a new issue #5604: TableViz raise Unexpected error when table include null value

[GitBox <gi...@apache.org>]

Wujiao233 opened a new issue #5604: TableViz raise Unexpected error when table include null value
URL: https://github.com/apache/incubator-superset/issues/5604
 
 
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   - [x] I have checked the superset logs for python stacktraces and included it here as text if any
   - [x] I have reproduced the issue with at least the latest released version of superset
   - [x] I have checked the issue tracker for the same issue and I haven't found one similar
   
   when table include number type columns and the value is `null` , The TableViz cannot display this table when these columns be selected in `NOT GROUPED BY`
   
   ### Superset version
   0.26.3 On centos7  + Python 3.6.5
   
   ### Expected results
   
   ### Actual results
   Unexpected error.
   
   ### Steps to reproduce
   
   Table DDL:
   `
   CREATE TABLE testt (
     id int(11) NOT NULL AUTO_INCREMENT,
     name varchar(255) DEFAULT NULL,
     value int(255) DEFAULT NULL,
     PRIMARY KEY (`id`)
   ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
   `
   Data:
   
   |id|name|value|
   |-|-|-|
   |1|aaa|1|
   |2|bbb||
   |3|ccc|3|
   |4|ddd||
   
   And choose these three columns in TableViz's `NOT GROUPED BY` selector.
   

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